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Notes: Heritability, Age-Age Correlations, and Inferences Regarding Juvenile Selection in Jack Pine

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Heights of jack pine trees from 101 open-pollinated families were measured at ages 1, 2, 3, 5, and 7 years. Age-age genetic and phenotypic correlations, and age-related fluctuations in heritability were evaluated to determine the optimal age for juvenile selection. Simple linear regressions of genetic and phenotypic age-age correlations on the natural log of the ratio of the two ages were significant (r² = 0.84 and 0.93 respectively). Genetic age-age correlations were greater than corresponding phenotypic correlations, particularly at longer age intervals. Heritability for tree height was highest at age 1 year, lowest at age 2, and intermediate thereafter. Results suggests that selection as early as age one would be an efficient strategy for improving rotation-age growth. For. Sci. 34(4):1076-1082.
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Keywords: Pinus banksiana; genetic correlation; indirect selection; phenotypic correlation; tree height

Document Type: Miscellaneous

Affiliations: Research Plant Geneticist, U.S.D.A. Forest Service, North Central Forest Experiment Station, Forestry Sciences Laboratory, P.O. Box 898, Rhinelander, WI 54501

Publication date: 1988-12-01

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    Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
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